ICL7135 To a Prop Chip Software is being test and will in Completed Project Sh

sam_sam_sam

·Would I need· any thing else to be able to read the ICL7135 with a Basic Stamp

··Data Sheet ...>>>··ICL7135
· Data Sheet ...>>>· HD-6402·......>>> I know that this chip is hard to get··· ·I do have a source to get this chip

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Sam

Post Edited (sam_sam_sam) : 12/24/2009 11:22:20 PM GMT

kwinn

If you are planning to use the UART to capture the data from the ICL7135 and send it in serial to the BS you do realize that you have to get the data from a minimum of 10 pins on the ICL chip. B1, B2, B4, B8, D1, D2, D3, D4, D5, and the sign bit. The over/under range signals might also be nice to have as well.

You might be better off using a prop instead of the UART. Far more flexible and fewer additional parts are needed.

kwinn

Here is a block diagram of the required and optional connections between the ICL7135 and the prop and an explanation of the proposed output format.

Post Edited (kwinn) : 11/19/2009 9:31:38 PM GMT

sam_sam_sam

Will this Board work for this Project ^







With this board ^^^^if ·reworked for the ICL7135 Chip will this work



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Sam

Post Edited (sam_sam_sam) : 11/21/2009 1:37:44 AM GMT

sam_sam_sam

I need feed back on the post above



Thank You

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Sam

kwinn

If I understand correctly what you would like to do is make a board the same size and pinout as the Platform Prototyper Module with the ICL7135 circuitry, interfacing resistors and the RS232 or RS485 driver chip on it. This board will then plug into the Propeller Platform Module, and the Platform LCD UI Module may possibly be added to the stack.

If that is the case it certainly looks like it is doable. The only thing to watch for is that you do not use the pins for the meter board that are used by the Platform LCD UI Module. You will also need a + and -5V supply for the meter board. You can get the +5 V from the Propeller Platform Module but the –5V will either have to be generated on the board or provided by an external supply. If you decide to generate it on the board try to keep it as far from the ICL7135 analog circuitry as possible.

sam_sam_sam

Here is the Board Lay out··· Please·Let me Know if some thing is not right with the board Layout

I will add· the - 5 volt power supply after I know that the main board is a good lay out

Thanks



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Sam

Post Edited (sam_sam_sam) : 11/21/2009 4:16:26 PM GMT

kwinn

There are a few things that need to be changed. I will email you the info shortly.

sam_sam_sam

I redone the board lay·out

I know that I do not have the rest yet I am doing one·piece at a time I am going to make this board a little longer to add the regulator for the ICL Chip

Please let me know what you think of this· board layout

I am not sure which type of display I am going to use so I Put all combination·so what pins I do not need those pins will not have resisters in them


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Sam

Post Edited (sam_sam_sam) : 11/22/2009 3:12:36 AM GMT

sam_sam_sam

Here is the new layout of this board

Please let know if you can see any thing wrong with this layout

I want to order some of these board soon

This is the first time making a board my self

so feed back is need and welcome

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Sam

kwinn

Check the Max488 layout. Going by the data sheet pin out for the dip:

Pin 1 should go to Vcc (V+) it now goes to P16

Pin 4 connects to digital Gnd, now goes to P19

Move pin 2 and 3 to P16/P17. No other connections are required to the prop so P18/P19 will not be used.

The transmit/receive from the max488 each requires 1 twisted pair of wires. Add a 4 pin header instead of the output connector. Pins 5-8 of the max488 should go to those header pins and stay in sequence (pin5 to header1, pin6 to header2, etc)

sam_sam_sam

By mistake I was looking at the MAX 487 instead of the MAX488

Please look at it· with a fine tooth comb·again and see if you find any more mistake very important that I have this right I only want to make boards that work right once

Thanks

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Sam

kwinn

The only remaining problem I can see is on the upper power connector, MAX488 power connection, and the V-/Vref connections to the trim pot.

1- V50 and GND are shorted on the bottom (green) layer of the PCB. Remove short and connect analog Gnd plane to GND connector at this point only
2- Vcc from the MAX488 should go to V50 on the top connector
3- V-, Vref, and both ends of the Vref adjustment pot are tied together. Connect as per the schematic.
4- V- from ICL7660 goes directly to V- on pin 1 of the ICL7135 only. If the V- is not required the ICL7660 can be left out and pin 3 and 5 jumpered to connect V- to ground.

Double check everything in the analog section very carefully. I may have missed something.

sam_sam_sam

Please Look at this one

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Sam

sam_sam_sam

Please Look again

at this REV7 Fix a few thing


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Sam

Post Edited (sam_sam_sam) : 11/29/2009 6:14:47 AM GMT

kwinn

No attachment in your post. Did you look at my revisions to the board?

sam_sam_sam

Yes I did Isend you an email

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Sam

kwinn

I did receive your email this morning. It was time stamped 1:33am, so email is obviously not as "instant" as we may think if you sent it around the time you made the posting here (6:16, or 9:16 my time).

sam_sam_sam

kwinn
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I want to Thank You for writing the code for the ICL7135·Chip to Propeller Chip


Up-Date

I am working on the Pro-to Board ·right now and hope to have it done by Monday and once I have tested to see how it works we post the code for everyone

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Here is the latest update Rev on the board

This is the pro-to board layout that kwinn use to test the code

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Sam

Post Edited (sam_sam_sam) : 12/24/2009 11:43:55 PM GMT

PJAllen

·kwinn is a busy guy.

OakGraphics

what program are you using to view/edit the board? I dont know the .pcb file extension. is that express-pcb? I normally use eagle.

OakGraphics

I like to answer my own questions. Yes it was express PCB. I downloaded the app and can see the board now.

sam_sam_sam

kwinn

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I want to Thank You for writing the code for the ICL7135·Chip to Propeller Chip
BOTH CODEs


Here is the code for the ICL7135 meter Chip

I Have not had time to test the new Meter board code yet but·I will try to do·it very soon

I had some time to test the code and it work GREAT

I test this code with·a meter board that I already had which the board has a clock Pulse already and the code is a little different

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Sam

Post Edited (sam_sam_sam) : 3/4/2010 12:05:50 AM GMT